2 Nov 2021
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Document Summary
Visceral sensory neurons are part of neither somatic nor autonomic nervous system: somatic neurons must innervate somatic tissues; autonomic neurons are all motor. However, it"s important to not forget the fact that we have sensory innervation of viscera they detect: distension of viscera, visceral pain. Visceral sensory neurons are important for understanding referred pain. Brain is better trained to detect external stimulations than internal stimulations. conscious part of the brain. Predicting patterns of referred pain from specific viscera. Hence, for any given viscera, you can predict the pattern of referred pain and the dermatomes involved, purely based on an understanding of the sympathetic innervation of different viscera. Pain from paired viscera is referred to skin on the same side: reason: visceral sensory neurons enters spinal cord segment from one side. Gi tract and associated glands/ducts develop in midline but migrate away from it: however, associated orifices (e. g. mouth and anal canal) remain in midline.
